Pipes P,Q and R together can empty a full tank in 6 hours. All the three pipes are opened simultaneously and after 2 hour, P is closed. The tank is emptied in another 6 hours. Find the time in which P can empty the tank ?

Pipes P,Q and R together can empty a full tank in 6 hours. All the thr

1.	Pipes P,Q and R together can empty a full tank in 6 hours. All the three pipes are opened simultaneously and after 2 hour, P is closed. The tank is emptied in another 6 hours. Find the time in which P can empty the tank ?
A.	12 hours
B.	16 hours
C.	18 hours
D.	20 hours
Answer» D. 20 hours

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Pipes P,Q and R together can empty a full tank in 6 hours. All the three pipes are opened simultaneously and after 2 hour, P is closed. The tank is emptied in another 6 hours. Find the time in which P can empty the tank ?

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